Big Bang Theory' Season 11 Renewal Update: Johnny Galecki Does Not .... 'Big Bang Theory' Season 11 Renewal Update: Johnny Galecki Does Not Want To Reprise His Role As Leonard? | International Business Times

10 Things You Didn't Know About Big Bang Theory Star Johnny .... For years Johnny Galecki was known as David from Roseanne, and now he is best known as Leonard Hofstadter from the massively successful series The Big Bang ...